Gordon, I got myself a BBU and a TT 1100 pot in May and have been it using on every trip so far. I pack the BBU in the TT pot and in the orange mesh bag, and then in a small plastic bag to avoid any soot getting into my backpack.
My TT pot is covered from top to bottom in soot, and I haven't yet bothered to clean it off. For me its a non-issue, although it can be a bit annoying to get soot on your hands if on the trail.
Concerning the smoke, I seem to attract the smoke as wherever I sit down the wind will change its direction to blow the smoke towards me =) So the cloths I am wearing smell a bit of smoke, though it doesn't bother me. If you would practice a "cook on the trail an hour before you find a campsite" approach I am sure you could be able to get minimal smoke smell into your gear, or you just pack your gear at camp there where the wind doesn't blow. Finally, I find the BBU does produce only a limited amount of smoke at all, so depending on the wood you're burning it could be non-existent.
I hope that answers your questions. Have fun with your BBU and let us know you like it!